In the current societal context facing high energy prices and resource shortages together with high pollution, catalysis using sunlight as energy source is a promising way to develop innovative sustainable processes for industrial implementations as proven by different approaches described in the literature. PLASMOCAT focuses on visible-light mediated dehydrogenation processes under oxidant-free conditions, from low to high challenging substrates (alcohols – amines – alkanes), obtaining both feedstock (carbonyl derivatives, imines, nitriles, alkenes) and molecular hydrogen, a carbon-neutral fuel. Also, PLASMOCAT foresees to couple the dehydrogenation of alcohols to the decarbonylation of aldehydes as a tandem process, with the aim of obtaining alkanes, including long carbon chain hydrocarbons. Therefore, composite materials combining photo-activation sites and catalytically active sites are considered. Although photocatalytic dehydrogenation of alcohols has been achieved with nanoparticles (NPs) of Pt, Au or Ag on TiO2, the employment of zero-valent NPs of 3d transition metals is almost unexplored. Thus, the synthesis of original plasmonic NPs of Cu and Co immobilized on different semiconductors, metallic and non-metallic ones, will be developed. Understanding the mechanisms of photocatalyzed dehydrogenation will be crucial for the design of catalytic systems with improved activity and selectivity. Accordingly, operando techniques (React-IR, UV-Vis, advanced X-ray techniques) will be applied to determine the kinetic reaction profiles and elucidate the interactions between the metallic NPs and the support. Moreover, a theoretical approach to understand the plasmonic behavior of metallic NPs and electronic transfer phenomena will be addressed. PLASMOCAT provides an excellent frame to train young researchers in innovative and sustainable nanocatalytic processes, leading to the synthesis of added value products, including the production of hydrogen.